405 results about "Yaw system" patented technology

The invention discloses a method for the fault diagnosis of wind turbines on the basis of a genetic neural network, in particular to a method for modeling the fault diagnosis of wind turbines on the basis of the genetic neural network capable of learning the operating data of the wind turbines in the history, more particularly a method for judging the probability that faults occur to a gearbox, a generator and a yaw system by reading the real-time operating data of the wind turbines online and calling the diagnosis model of the genetic neural network to carry out the analysis on the real-time data, thus judging the fault state of the wind turbines. Based on the method combining the genetic algorithm with the neural network, the invention can achieve the algorithm complementation, improve the model convergence and diagnostic capacity and ensure higher robustness; and the method capable of carrying out the online monitoring and fault diagnosis on the operating state of the wind turbines on a real-time basis to take maintenance measures as soon as possible can improve the reliability of the wind turbines and reduce the maintenance cost.

A method for reducing the loads acting on a wind turbine yaw system due to yawing moments which are induced to the yaw system by a rotor which comprises at least one rotor blade with a pitch control system is provided. In the method, the yawing moment which is induced to the yaw system by the rotor is determined and the pitch of the at least one rotor blade is set based on the detected yawing moment such that the determined yawing moment is reduced.

A method for operating a wind farm is provided. The method includes determining a wind condition, determining a wake-effect between at least two wind turbines forming at least a sub-set of the wind farm, each of the at least two wind turbines having a yaw system, and determining a desired yaw angle setpoint for each of the at least two wind turbines so that a total power production of at least the sub-set is expected to be increased compared to independently operating the yaw systems of each of the at least two wind turbines. Furthermore, a wind farm is provided

A wind turbine includes a tower member a yaw system, and a wind energy collection system. The wind energy collection system includes a central hub and a plurality of blade members. The wind turbine further includes a component manipulating system operatively coupled between at least one of the plurality of blade members and the tower member. The component manipulating system includes a blade member support structure including a first end pivotally connected relative to the tower member that extends to a second end operatively coupled to the one of the plurality of blade members, and a winching system operatively connected to the one of the plurality of blade members and the tower member. The winching system is selectively operated to shift the one of the plurality of blade members relative to the tower member in order to enable serving of the wind turbine.

The invention discloses an online monitoring and fault diagnosis system of large wind turbine units. A sensor and data collection equipment are installed on a wind turbine unit to be detected, so as to collect equipment operation state characteristic signals, such as video signals, noise signals, flame signals, electric signals, vibration signals and pressure signals, of the wind turbine unit, and transmits the state characteristic signals to a central control room of a wind power plant through a network in real time; and operation and maintenance personnel can know the operation state of the wind turbine unit at any time in the central control room of the wind power plant, and can directly analyze signal data of the abnormally operated wind turbine unit, so that operation conditions of gear boxes, main shafts, generators, bearings, hydraulic systems, yaw systems, bearing lubricating systems, brake systems, blades and towers of all units in the wind power plant are monitored in real time and failure warning information is output. Data can also be transmitted to a remote fault diagnosis center through a network, a project team performs professional analysis to faults and issues a diagnosis report, and a field maintenance team performs corresponding repair / maintenance operation.

A wind turbine with a rotor comprising one or more rotor blades and a hub, the hub being attached to a nacelle, a yaw system for rotating the rotor to orient it in a wind direction, and one or more line of sight detectors for detecting a component of wind velocity. The one or more detectors are mounted such that they rotate under the action of the yaw system. A control system is coupled to the one or more detectors and is arranged to compare the detected wind velocity component with a wind velocity value and control the yaw system in response to the comparison. The nacelle can be rotated under control of the control system until the yaw error is substantially zero.

The invention provides an automatic calibration method and device for air aligning errors of a wind generation set. The method includes the steps that historical operation data of the target set in a preset time period are obtained; abnormal data are removed from the historical operation data of the target set; dimensionality reduction processing is conducted on target data, and relation curves of the air aligning errors and the air outlet performance are determined according to the data obtained after dimensionality reduction processing; an inherent air aligning error is determined according to the relation curves of the air aligning errors and the air outlet performance; and a zero parameter in a yaw system of the target set is corrected through the inherent air aligning error. By means of the automatic calibration method and device for the air aligning errors of the wind generation set, the historical operation data of the wind generation set are fully utilized, the inherent air aligning error of the yaw system of the target set is automatically identified by conducting data mining and analyzing on the historical operation data so that the zero parameter in the yaw system can be automatically adjusted through the inherent air aligning error, the adaptive ability of the yaw system of the set is improved, and the actual force applying performance of the set is improved.

The invention discloses a method for controlling a yaw system of a wind turbine. Starting constraint conditions are established based on a full life cycle cost theory and by comparing yaw comprehensive cost and predicting the unit capacity after yaw to judge yaw maneuver under different working conditions, the contradiction between the wind turbine capacity and the losses of the yaw maneuver is eliminated, the service life of a yaw system is prolonged, and the maximization of the comprehensive benefit of the full life cycle of the wind turbine is achieved. According to the method, the wind speed, the wind direction changing rate, the wind direction changing angles and other factors are taken into consideration comprehensively, and scientific judgment is carried out on whether the yaw maneuver is necessary or not from the point of view of the economic optimality of the full life cycle when threshold value control requirements are met by predicting the increased capacity after yaw and combining cost analysis of the yaw maneuver.

The invention provides a wind turbine generator system yaw system control performance optimization method and system. The method comprises the steps of acquiring the data of incoming flow air in front of a machine cabin at fixed time intervals, wherein the data of incoming flow air includes the incoming flow air speed, the incoming flow absolute wind direction and the wind direction of incoming flow relative to the machine cabin; sectoring the incoming flow absolute wind direction according to the preset angle intervals, and sectioning the incoming flow air speed according to the preset wind speed intervals; carrying out the first time of grouping on the data of the incoming flow air according to sectors and subsections; calculating the yaw errors of the corresponding groups according to the wind direction of the incoming flow relative to the machine cabin to obtain a yaw error optimization model; and when the yaw system is optimized, inputting the measured incoming flow air speed and the measured incoming flow absolute wind direction into the yaw error optimization model, carry outing matching to find the corresponding yaw error, and correcting the corresponding yaw error to the input of a yaw control system. With the wind turbine generator system yaw system control performance optimization method and system, different optimizing strategies can be adopted for wind turbine generator systems of different models in the situations with different wind speeds of incoming flow, and the optimizing accuracy of yaw errors is improved.

Assembly of components inside a large wind turbine, positioned between the upper section (3) of the tower (1) and under the nacelle. The components, which are transported pre-assembled to the site, are horizontal, circular platforms (6a and 6b), a vertical ladder (5) that goes through both platforms (6a and 6b) and a central structure (7) that joins and integrates the entire unit. The middle connection part (8) fitted onto the nacelle frame (4) allows the aforementioned unit to be coupled to the nacelle. The platforms (6a and 6b) house electrical devices for the drive train and the yaw system, as well as the lubrication and refrigeration system for the drive train. Once all the components have been assembled, they turn together with the nacelle while it rotates to face the wind.

A novel real-time damping control method of a yaw system of a wind generating set comprises receiving wind direction data and wind speed data in current state by using a wind indicator if yaw movement is needed in a normal operation process of the wind generating set; and sending the wind direction data to the yaw system after obtaining the yaw system, calculating needed yaw angles by a system according to the wind direction data and conditions of the wind generating set at current, then calculating best yaw speed in the current condition through the system by using the yaw angles according to a relationship between the yaw angles and the yaw speed.

The invention discloses a method for correcting the wind alignment deviation of a wind turbine. The wind turbine is a horizontal-axis wind turbine. The method includes the following steps that firstly, a laser radar wind meter is installed and used for measuring the real-time wind direction in front of a wind wheel of the operating wind turbine, and the direction of the central axis of the laser radar wind meter and the direction of the central axis of a cabin of the wind turbine need to be kept the same in the installing process; secondly, according to a plurality of measured real-time wind directions, the actual wind alignment deviation value alpha of the wind turbine is acquired through statistical analysis; thirdly, the installed location of the initial zero position of a wind indicator on the cabin of the wind turbine is adjusted, and then the included angle between the initial zero position of the wind indicator and the horizontal axis of the cabin of the wind turbine changes from zero to alpha, accurate wind alignment of the wind turbine is achieved, and the measured value of the wind indicator of the adjusted wind turbine can serve as input of a wind turbine yaw system. According to the method for correcting the wind alignment deviation of the wind turbine, accurate wind alignment of the wind turbine is achieved, the method can be used for improving the power generation performance of the operating wind turbine, additional loads are reduced, production cost of the wind turbine is not increased, and the method is suitable for being popularized and applied.

A method for preventing over torque and failure of yaw system components in a wind turbine is disclosed. The method may include providing a yaw system having a yaw drive including a drive motor for facing a nacelle positioned on the yaw system in a preferred wind direction. The method may also include preventing operation of the drive motor beyond a normal operating region on a torque-speed curve of the drive motor to avoid torques that may damage the yaw system components.

A wind turbine includes a tower member a yaw system, and a wind energy collection system. The wind energy collection system includes a central hub and a plurality of blade members. The wind turbine further includes a component manipulating system operatively coupled between at least one of the plurality of blade members and the tower member. The component manipulating system includes a blade member support structure including a first end pivotally connected relative to the tower member that extends to a second end operatively coupled to the one of the plurality of blade members, and a winching system operatively connected to the one of the plurality of blade members and the tower member. The winching system is selectively operated to shift the one of the plurality of blade members relative to the tower member in order to enable serving of the wind turbine.

The invention relates to the technical field of wind power generation yaw, in particular to a draught fan foreseeable yaw control system based on imminent prediction. The system comprises an anemorumbometer, a prediction module, a yaw counter, a master controller, a yaw frequency converter and a yaw encoder. The anemorumbometer and the prediction module are in signal connection with the master controller. The output end of the master controller is connected with the yaw control frequency converter, a yaw motor and a wind driven generator in sequence. The output end of the yaw motor is in signal connection with the master controller through the yaw counter. The wind driven generator is in signal connection with the master controller through a yaw decoder. According to the draught fan foreseeable yaw control system based on imminent prediction, the active type intelligent yaw system is achieved based on a wind speed and direction ultra-short-term prediction model; analogue control can be achieved and the problem that generated energy is affected due to shutdown is avoided even on the condition that anemorumbometer is damaged.

The present invention relates to a wind turbine structure comprising a wind turbine tower with a nacelle arranged on the top to which a rotor hub with one or more rotatable mounted wind turbine blades are mounted which form a rotor plane. A floating foundation is mounted to the bottom of the wind turbine tower and the pitch and / or yaw system are used to regulate the position of the wind turbine structure. A control unit detects the relative movement of the wind turbine structure in two axial directions and activates the pitch or yaw system to move the wind turbine structure into an equilibrium position. This reduces the directional movement of the wind turbine structure so that it remains in a stable equilibrium position. This also reduces the oscillating movement and tension forces in the anchor chains.

The invention combines fuzzy control with neural network, and provides an intelligent control method for a windmill generator yaw system. By using the fuzzy control, the windmill generating yaw system is controlled with better dynamic performance and robustness by effectively compositing the experience and knowledge of experts without precious mathematic models. In addition, the self-learning function of neuron algorithm is used for automatically extracting the fuzzy rules of fuzzy control and optimizing membership function. The method organically combines the fuzzy control theory and neural network and has the advantages of making the best of each other and effectively improving the control capability of the yaw system.

The invention discloses a method, a device and a system for safety protection used in failure of putting away an oar of a blade of a wind turbine generator. The method comprises the following steps: collecting and computing a real-time rotating speed of a blade hub; after a safety chain system sends a stopping command, if the rotating speed of the blade hub is continuously increased, judging a pitch control system to have a fault of putting away the oar; computing a yaw angle command; sending the computed yaw angle command to a master control PLC (Programmable Logic Controller), and controlling a yaw system to carry out a yaw action through the master control PLC. The system comprises a rotating speed computing module, a pitch control fault judging module and a yaw command computing module. The device comprises a safety protection controller internally provided with the system and connected with the safety chain system and the master control PLC; a rotating sensor used for collecting the real-time rotating speed of the blade hub; and a rotating speed processing circuit connected with the rotating speed sensor and the safety protection controller. According to the invention, the overspeed risk of the wind turbine in a stopping process is reduced, and the safety of the wind turbine and the reliability of judgment of the pitch control fault are improved.

The invention discloses a mechanical coupling type magnetic suspension wind turbine generator yaw system which is applied to a large and medium wind turbine generator. The mechanical coupling type magnetic suspension wind turbine generator yaw system comprises a planet gear, a conical gear, an electromagnetic clutch, vertical suspension windings, horizontal suspension windings and yaw motors. Wind turbine generator yaw mechanical torque and yaw motor torque are coupled through planet gear torque to drive a wind turbine generator cabin to be yawed. The wind turbine generator yaw mechanical torque is taken from electric generator front side wind turbine generator torque through the electromagnetic clutch and the conical gear with the fixed transformation ratio. The yaw motor torque is controlled by a bidirectional PWM converter during cabin suspension, cabin suspension is jointly controlled by the horizontal suspension windings and the vertical suspension windings, the cabin gravity is balanced through the horizontal suspension windings, the vertical suspension windings restrain off-centering, the yaw motors can work in the two modes including the electric mode and the regenerative braking mode through changes of the wind turbine generator yaw torque, and bidirectional energy flowing is completed through the PWM converter. According to the mechanical coupling type magnetic suspension wind turbine generator yaw system, the yaw power energy conversion link is omitted, the yaw power consumption is greatly reduced, and the wind energy use rate is improved.

The invention discloses a sliding friction sheet replacement method and device of a wind driven generator yaw system. Through screwing the yaw gear ring of the wind driven generator and a flange linkage bolt on a tower cylinder, the yaw gear ring and the flange linkage bolt are in contact with cabin base plates of the wind driven generator on the yaw gear ring; as the continuously lifting of the bolt, the cabin of the wind driven generator is hoisted at the part; an upper friction sheet which is pressed tightly between the cabin of the wind driven generator and the yaw gear ring is loose, and a friction sheet mounting plate can be drawn out for replacement; a yaw gear ring close to the part of yaw clamping calipers and the flange linkage bolt on a tower cylinder are replaced into a screw rod; a thread at the head part of the screw rod is screwed into a thread of the yaw gear ring is fixed in the thread; a customized support plate is fixed on the tail part of the screw rod by a nut; one part of the support plate is fixed on the lower part of the yaw clamping calipers so as to bear the yaw clamping calipers; as the rotation downward of the nut below the support plate, the yaw clamping calipers decrease along with the nut through the support plate, after the yaw clamping calipers decrease to enough space, a lower friction sheet in the yaw clamping calipers and a lower friction sheet at the side surface of the yaw clamping calipers are replaced.

A wind turbine comprising a tower and a nacelle which is rotatably mounted on the tower and whose alignment is adjustable by means of a yaw system, wherein the yaw system has at least one adjusting drive, a rotatable yaw bearing, at least one brake disk and at least two brake units which can exert a braking torque on the brake disk, wherein the at least one of the brake units has a first brake pad with a first coefficient of friction, and at least one of the brake units has a second brake pad with a second coefficient of friction, wherein the first and the second coefficient of friction are different from each other.

The invention provides a wind power plant field-level yaw control method based on a laser radar wind measuring instrument. The method comprises the following steps that wind speed data and wind direction data of the corresponding positions are measured through laser radars which are arranged in the preset positions of a wind power plant and the laser radars are arranged in preset number; the windspeed data is processed to obtain a wind power plant local single-machine wake flow model; a wake flow model of the whole wind power plant is obtained through the local wake flow model; the current yaw angle correction factors of wind turbine generator sets are calculated according to the wake flow model of the whole wind power plant; the advance wind direction information is measured through thefront-row laser radars and serves as a compensation signal for yaw of the first-row wind turbine generator set; and the wind turbine generator set yaw control is carried out on the basis of a wind direction signal of a wind speed wind indicator and a current yaw correction signal and the compensation signal. According to the control method, the measurement cost can be saved, the accuracy of the wind power plant wake flow model can be improved, and the macroscopic yaw control precision and power capture of the wind power plant are improved, the generating capacity of the wind power plant is improved, and the service life of a yaw system is prolonged.

The invention discloses a typhoon-resisting yaw control method for a wind generating set. When a power grid is in a normal condition, if a yaw system of the wind generating set is normal and a wind indicator is normal, the wind generating set initially enters the leeward state; if the yaw system fails or the wind indicator fails, a brake of the yaw system is opened, and the wind generating set is in the free yaw state; and in the situation of outage of the power grid, a UPS and a storage battery supply power, the brake of the yaw system is opened, and the wind generating set is in the free yaw state.

The invention discloses a wind alignment method of a wind generator yaw system. The method comprises the steps that a current yaw starting angle parameter is obtained through current wind speed according to the functional relationship between the wind speed and a yaw starting angle by a yaw system; and when a deviation angle between a wind generator bin and the wind direction is judged to be larger than the current yaw starting angle by the yaw system, the yaw system controls the wind generator bin to yaw. According to the wind alignment method, the yaw starting angle is set according to the current wind speed, so that yaw starting control is more precise; the action frequency of the yaw system is effectively lowered; abrasion of yaw gears is reduced; yaw fatigue is alleviated; and the generation capacity of the wind generator is improved.

The invention relates to a condition monitoring device for a slidably yaw system of a wind generator. The condition monitoring device comprises a data collecting device used for acquiring signals of a yaw mechanism; a data collecting card used for receiving the signals monitored by the data collecting device; an upper computer used for receiving and processing the signals transmitted by the data collecting card; a transmitting module used for transmitting the data processed by the upper computer; a computer used for receiving the data transmitted by the transmitting module and storing and analyzing the data through a software. According to the arrangement, changes of relative parameters are monitored during yaw, drive torque of a yaw motor is calculated, work state of the yaw system of a wind turbine is timely judged, safe running of the wind turbine is guaranteed, location of a fault of the yaw system is accurately judged, and maintenance of the wind turbine is supported.

The invention relates to the field of engine testing, and provides a wind generating set monitoring system based on a physical component model and real-time data. A wind condition input module receives real-time wind condition information obtained by a power plant, and the real-time wind condition information is respectively transmitted to a control system and a blade physical simulation module. The control system sends a yaw system control strategy to a yaw control module and sends a variable pitch system control strategy to a variable pitch control module, and information of a rotation angle, angular speed and angular acceleration of a cabin is generated by the yaw control module and transmitted to the blade physical simulation module. Information of a rotation angle, angular speed and angular acceleration of a blade is generated by the variable pitch control module and transmitted to the blade physical simulation module. After the blade physical simulation module integrates the obtained information with blade stress and stress toque information, information of target torque, target rotation speed and target angular acceleration of the blade is obtained and transmitted to a transmission module, and the transmission module outputs electric power information. The wind generating set monitoring system provides dual verification for prediction of performance failure of a wind generating set.

A wind turbine generator is provided in which a gear having a large diameter is not required in a yaw drive device (30) of a yaw system (10A). The yaw drive device (30) of the yaw system (10A), which revolves a nacelle (3) depending on the wind direction, includes a electric motor (31) which is fixedly provided on a nacelle base plate (12), with an output shaft (31a) substantially aligned with a pivot of the nacelle (3). The output shaft (31a) and a fixed-side support member (2b) provided in the vicinity of an upper end of the tower (2) are coupled by a coupling shaft (33) having couplings (32) provided at both ends thereof.

The invention discloses a method and a device for dynamically correcting the yaw deviation of a wind turbine generator system to the wind, By dynamically obtaining the optimal yaw wind deviation, Theoriginal wind direction signal can be compensated by the dynamic correction device, and the actual wind direction angle at the fan impeller can be corrected, so that the measurement accuracy of the wind direction at the fan impeller can be improved, the electric quantity of the wind turbine generator system can be improved, the unbalanced load of the yaw system can be reduced, and the service lifeof the yaw system can be prolonged. The problem that the optimal angle of wind deviation can not be obtained is solved by analyzing the data collected on site, including data pre-processing and dynamic processing.